When you buy a replica Omega with the caliber 8605, the movement is the most important part. A good replica uses a clone or modified movement that mimics the genuine co-axial escapement and gives a smooth sweep second hand. Focus on the movement first, then the case, dial, and bracelet. The best replicas source reliable automatic movements, often from Japanese or Swiss suppliers, and they regulate them to run within a few seconds per day. If the seller cannot tell you which movement is inside, walk away.

What to Look For

  • Movement type: A true clone of the 8605 (like the A8605) or a modified ETA 2892 with co-axial decoration. Avoid cheap 21-jewel Chinese movements that lack proper finishing.
  • Accuracy: A good replica should keep time within -10 to +15 seconds per day. Ask for a timegrapher readout.
  • Power reserve: The genuine 8605 has 60 hours. Replicas deliver 38 to 48 hours in most cases. Anything less than 36 hours is a red flag.
  • Date function: The date should change with a snap at midnight, not slowly. Check for correct alignment in the window.
  • Finishing: Look for Geneva stripes, perlage, and blued screws on the rotor and bridges. Poor finishing means poor quality control.
  • Case and crystal: 316L stainless steel is standard. Sapphire crystal with anti-reflective coating is a must. Mineral glass is a sign of a low-tier replica.
  • Dial and hands: Fonts, logo placement, and hand shapes must match the genuine. The lume should have uniform thickness.

Parameter Bands

Use these ranges to judge a replica before you buy.

  • Movement origin: Japanese (Miyota) or Swiss (ETA) based > Chinese clone > generic Chinese.
  • Accuracy: Excellent: -5 to +10 sec/day. Acceptable: -15 to +20 sec/day. Poor: beyond +30 sec/day.
  • Power reserve: 48+ hours = good. 38-47 hours = average. Under 36 hours = avoid.
  • Case diameter: The genuine Aqua Terra with 8605 is 38.5mm or 41.5mm. Replicas often come in 39mm or 41mm. Stay close to original dimensions.
  • Water resistance: 150m (15 ATM) is typical. Replicas often claim 50m but may not seal. Do not swim with a replica unless tested.
  • Weight: A good replica should feel substantial. The genuine is around 150g with bracelet. Under 120g feels cheap.

Pitfalls to Avoid

  • Fake clone movements: Some sellers advertise a "clone 8605" but install a decorated low-grade movement. Ask for photos of the movement and compare to genuine photos.
  • Misaligned date wheel: A common flaw. Check that the date sits centered in the window.
  • Noisy rotor: A rattling or grinding sound means poor bearings. The genuine is almost silent.
  • Wrong decorations: The co-axial escapement is often faked with a decorative plate. That is fine if the watch keeps time, but do not pay a premium for fake decoration.
  • Incorrect dial text: Spacing, font weight, and the "Co-Axial" script are frequent errors. Zoom in on seller photos.
  • Cheap bracelet: Squeaky links, sharp edges, and poor clasp action are signs of a low-end build.

FAQ

Is a replica 8605 movement reliable? A well-made clone can last years with proper care. Avoid the cheapest versions. Service every 3 to 5 years.

Can I tell a replica 8605 from the genuine? A watchmaker can. The genuine has a silicon balance spring and a free-sprung balance. Most replicas use a conventional balance with a regulator. The decoration is also different under a loupe.

What is a fair price for a replica 8605? We do not quote prices. But expect to pay more for a Swiss-based movement and real sapphire. If the price seems too low, assume the movement is a cheap Chinese copy.

Should I buy a replica with a decorated rotor? Decoration does not improve timekeeping. Prioritize a regulated movement and a clean date change over cosmetic engraving.

How do I maintain a replica 8605? Keep it away from magnets, wind it on a set schedule if not worn, and have it cleaned by a watchmaker who works on replica movements.